*{
    margin: 0;
    padding: 0;
}
/*layout*/
#app{
    width: 100%;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    box-sizing: border-box;
}

/*头部*/
#header{
    width: 100%;
    min-width: 960px;
    height: 60px;
    background-color: #fff;
    /*overflow: hidden;*/
    position: fixed;
    box-shadow: 2px 2px 10px #DCDFE6;
    z-index: 28;
}
#header-main{
    width: 60%;
    height: 100%;
    margin: 0 auto;
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    box-sizing: border-box;
}

#header-main .left{
    height: 100%;
    display: flex;
    flex-direction: row;
    justify-content: flex-start;
    align-items: center;
    box-sizing: border-box;
}
#header-main #logo{
    width: 80px;
    height: 100%;
    margin-right: 20px;
}

#header-main .no-login,#header-main .is-login{
    height: 100%;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    box-sizing: border-box;
}
#header-main .is-login:hover{
    cursor: pointer;
}

.sign:hover{
    color: #409EFF;
    cursor: pointer;
}

#space{
    margin-left: 5px;
    margin-right: 5px;
    color: #909399;
}

.el-avatar{
    margin-right: 10px;
}

#header-main .is-login{
    height: 100%;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    box-sizing: border-box;
}

/*main*/
#main-container{
    width: 100%;
    min-width: 1080px;
    min-height: 400px;
    margin-top: 60px;
}

/*footer*/
#footer{
    width: 100%;
    height: 180px;
    margin-top: 80px;
    background-color: #00A8F3;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    box-sizing: border-box;
}
#footer-main{
    width: 100%;
    height: 100%;
    color: #fff;
    font-size: 12px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    box-sizing: border-box;
}
#footer-main img{
    width: 200px;
}

.course-video-container .el-dialog .el-dialog__body,.course-video-container .el-dialog .el-dialog__header{
    padding: 0px !important;
}